Vibrating screen



Jan. 6, 1931. G. w. BEHNKE ET AL K 1,787,852

VIBRATING SCREEN Filed oct. 2'1, 192s 5 sheets-sheet 1 fluor/nml,

Jan. 6, 1.931.

G. W.' BEHNKE ETAL VIBRAT'ING SCREEN 3, Sheets-Sheet 2 Filed Oct. 2l, 1925 in g atto: nav

Jan. 6,1931. l G,w. BEHNKE E'rm.v I 1,787,852

VIBRATING SCREEN Filed oct. 21, 192 s sheets-.sheet 's Patented Jan. 6, y"1931 UNITD :STATES PATENT OFFICE J GEORG-E W. .'BEHNKE AND LEWIS E. SOLDAN, 0F DURAND, MICHIGAN, ASSIGNOBS T0 SIMPLICITY ENGINEERING COMPANY, F DURAND, MICHIGAN VIBRATING SCREEN Application led Ootobersl This invention jrelates 4to oscillatory screens for screening sand, gravel, coal, ore, slag and various other `fragmentary materials of eitherfwet or dry classication.

The primeobject of the inyention is to def sign a balanced oscillatory screen' in4 which frame vibration is entirely eliminated, and

, 192e. serial No. 143,059.

Fig. 4 is a section taken on the line 4.-4 of Fig. 3, and illustrating the eccentric.

Fig. 5 is an enlarged fragmentary sectional view illustiatin the dust proof closure for the end of the s ell.

Fig. 6 is an end view thereof. l

Referring now-particularly to the drawprovide means for imparting air-,eccentric ings in-Which we have shown the Preferred oscillatory movement to the screen to throw embodiment .of our invention, the numeral 5 the productbeing screened both horizontally indicates the frame of the machine which and vertically.

comprises spaced apart inclined side members l. One object of the invention is to design a 6 connected at the top and bottom by means I screen having an eccentric movement which ,A of a cross member.7,rand while in the present `will have no dead spots, which will not blind instance We have Shown and refer to make or load, and in which the -actionis exactly the .the 'frame 0f Structural mem elSl, 1t Wlll 0f same atthe extreme edges as at the center of @01H58 be' undeIStOOd that Cast Slde' plates the screen. f i or. any other suitableconstruction may be Another object is to design al practical, USedsubstantial and efficient screening device, A pall 0f dust PIOO hOuSlngs 9eXtnd Which will have a maximum capacity for'theo transversely across the framew and elfe area. of tha, Screen, and t0' whichv additional adapted' tocontain the vibrating mechani`smscreen units may be quickly and easily added for lmpeltlng motlon 't0 the sc leen PIQPel, without changing the driving mechanism or Shafts 10 belng mllllted theleln and 30111- frame proper. ,i A v i A furthei` object is' t0y design a, Screen in cured tro` the frame by means of boltsl 12 in which thefentire driving mechanism, such as the usuel manner l shafting, bearings, gears, etc., is entirelyen- Certellf spaced @Pal'tseetlone 0f ihe Shaft closed in a dust proof housing, making it 10,@16 tllllled t0 \f0lm counteibalanced eccendust-and dirt roof, t. tries as clearly shownat 13 1n Fig. 3 of the A further o ject stillis to rovide spaced dlalWlPgSa and, efe ,Sllrl'eullded by ball IaCeS apart shafts having dust prooi) housings with 14, Whlch efe monete@ 111 a tn bulel llee e011 eccentrics mounted herein a screenV and temer .15; and Whlch s Pl'UYlded Wlth e Cellframe hung from said housing and which aren -trally 'qlsposed Verrull im) Synchronized by 'a shaft and gearing e1imi A formed integraltherewith, a flanged t bular natiiigyibration from the machine frame member 17 bemg 'the/'011e end 0f the C011' ro er.r i p f, I p Trlie above and other objects will appear a's.' 0f the tublllel housmg 9 Whlch een .be Welded the specification progresses reference being 0l' Othel'wlse seeul'ed f he'eljo t0 'Provlde a had t0-the accompanying (1I-mugs in which leal; and dust proof ;|oint The. counterbalwe have shown the preferred embodimentof anlllg of the nfamhgft 1S, a'ccnphshed by our invention, and in which like reference Y tummg certam Sections Pf the 1 1191111 Shaft Off numerals indicate like parts throughout the enterfo fon? ecceltmcs Whleh are Jour? gevel-a1 views thereof, -nalled inthe said bearings on which the tubu- In the drawings, lai-,brace container or housm p. 9 is mounted. Fig.A 1 is a side view of our improved The'eentll SGCIOD 0f the 13121112 Sheff? I .lCtS 8S screening device'v showing a. two deck ma- ,a weight or counterbalanc'e which is 'directly chine. opposed to the throw of the eccentrics, 'and 2 is atop` plan view thereof. vinv manufacturing these shafts they are accu- Fig. 3 is an enlarged part sectional detail of rately weighed with relation to the throw of the dust proof housing and drive:

naled in ball type self ali-ning bearings 11 seor flange 16 ta'iner 15, and is adapted to receive the end th'eeccentrics toproduce thedesired counter- 10 balancing action. The shaft immediately adjacent the one end of the bearing is turned to a smaller diameter as shown at 18, a hub 19 being mounted thereon and provided with grooved interlocking iianges 20, which form a closure for the end of the memberl,

'as well as an oil seal to prevent the escape. of oil from the bearing, suitable fittlngs, (not shown) being provided for introducing oil to the bearings. A disc or shield member 21- is secured to the i endof `the tubular housing /by means of set screws 22, which also secure the member 23 in position, said member 4being formed as clearly shown in Eig. 6 ofthe drawings, and acting as a slinger to throw dirt, dust,

' and foreign matter from the bearing; a second disc or shield member 24 embraces the shaft, and a hub 25 holdsA it tightly inposition; the above described arrangement pre/cludes the possibility of dirt or matter getting to the bearing. i

Gear boxes 26` are provided the frame into which the ends of the shafts l0 extend, and these 'gear boxes are secured.l

to the tubular member 27F 0j the bearing 11 n `any approved manner, a bev/el gear'28 being mounted on the end of the shaft 10,

meshing with and being driven by a similar gear 29 which is mounted on a longitudinally disposed shaft- 30, which connects and drivesJ .the shafts 1 O,.a motor' (not shown), being l mounted on the'upper end 'of the frame, and

connected to theprojecting end of the shaft 30 to form a direct drive, or a gear or pulley can be mounted on this shaft and driven from any convenient source of power, and it will be obvious thatl the screenv actuating mechanism will be accurately synchronized by the cured to and hang from .the Hanges 16 of the members 1'5, and are secured thereto by. means of bolts, the lower ends of the plates being connected by means of a rod 35, the ends of which are threaded to receive nuts 36, a pipe spacer 37 being mounted on the'y rod, gand clips 38 are secured thereon in spaced relation, and are formedwith suitable openings adapted to receive the threaded end of a hook vbolt 39 which engages the frame 40 over which the screen 41 is stretched, and when it is desired to remove the screenpit is merely necessary to release-the nuts on the hook bolts,'when the screen can be quickly and easily removed. w

In practice thepower is appliedv as above described, the shafts 10 revolve in the bearings14, the eccentrics roducing a distinct horizontal and vertical t row, the counterbalforeign at one side of disposed side vplates 33 are s-eancing of these shafts eliminates frame vibration, and the synchronizing of these shafts insures the same` vibration at every spot on the screen regardless ofthe speed, ,and the enclosing of all moving parts eliminates the possibility lof accident or injury to the operator by Ihaving clothing or other material and dirt proof construction.

The fact that any reasonable number of screens may be added to the same unit without in any manner changing so that any desired separat-ion may be secured is also a desirable feature.

From the foregoing description it will beV obvious that we have perfected a very simple, substantial and effective screening device.

What we claim is 1.- The combination of a screen provided with side plates rigidly connected to the screen and preventing independent vibration of the same, a transversely disposed counterbalanced shaft having eccentrics thereon, a

caught in the machine and provides a dust dust proof case enclosing said counterbalanced shaft and eccentrics, the case being closed from end to end' and connected/with and supporting the 'side plates and the screen.

2. The combination of a frame, an oscillating mechanism mounted thereon and comprising a counterbalanced shaft provided with eC- cen-trics, a dustlproof case enclosing said shaft and eccentrics, ascreen provided with substantially parallel, side plates rigidly connected with the screen and with the case and preventing independent vibration of the screeiifsaid plates depending from the dust proof case and adapted to receive additional screens, and means for driving said oscillating mechanism.

3. `The combination of a fram-e, spaced apart oscillating mechanism mounted thereon and.v comprising transversely disposed counterbalanced shafts having eccentrics' thereon, a plurality ofV screens provided with side plates common to all of the screens and rigidly connected with the same and preventing independent vibration of the screens, said side plates being secured to said oscillatingmechanism, acase enclosing'said shaft and eccentrics, said case being closed from end to end and connected with and bracing the side plates, and means connecting said transversely disposed shafts for driving and synchronizing the same. 4. The combination of a\frame, an oscillating mechanism mounted thereon and comprising a transversely disposed counterbalanced shaft having eccentrics, a combined tubular brace and dust proof case enclosing said shaft and=eccentrics, a screen having substantially VVAparallelside plates rigidly connected with the vscreen and with the case and. preventing independent vibration of said screen, said case being closed from end to end. K 5. The combination of a screen having side walls consisting of plates rigidly connected with the screen, anoscillatmg mechanism comprising transversely disposed counterbalanced shafts having eccentrics thereon, a tubular dust proof case enclosing each shaft and eccentrics and secured to said side walls at .the upper portions thereof, said side walls depending from the tubular cases and preventing independent vibration of the screen and adapted to receive additional screens.`

6. The combination of a screen having side walls consisting of plates rigidly connected with the screen and preventing lndependent vibration of the screen, an oscillating mechanism comprising spaced apart transversely disposed counterbalanced shafts having eccentrics thereon, a combined tubular'brace and dust proof case enclosing each shaft and eccentrics and 4secured at its ends to the screen walls, said Walls depending from the dust proof cases and adapted to receive additional screens, and meansconnected with the shafts for synchronizing and imparting rotary motion thereto.

7. The combination of a screen having side walls consisting of substantially parallel plates rigidly connected with the screen and preventing independent vibration ofthe.

same, oscillating mechanism comprising spaced apart transversely disposedl counterbalanced shafts having eccentricsa combined tubular brace and dust proof case enclosing each shaft and eccentrics and secured at its endsto said walls for supporting and stiifening the screen, said walls depending from the said cases and adapted to receive additional screens and said cases being closed from end to end, and driving means connecting the said shafts and synchronizing the same.

8. The combination of a screen having side walls lconsisting of substantially parallel plates rigidly connected with the screen and preventing independent vibration of thesame oscillating mechanism comprising spaced apart transversely disposed counterbalanced shafts having eccentrics thereon, a combined tubular brace and dust proof case enclosing tures;

each shaft and eccentrics and secured to the ends of the screen walls at the upper portions thereof, said screen walls dependin from the said dust proof cases and adapte to re-v ceive additional screens, means forming closures for the ends of the dust proof cases, and driving means connecting said shafts and synchronizing the same. v

In testimony whereof we aix our` signa- GEORGE w. BEHNKE. LEWIS E. soLDAN. 

